fix: Final restoration with port 80

✅ COMPLETED:
1. Dockerfile uses port 80 (astro preview)
2. BaseLayout imports globals.css
3. globals.css with Tailwind v4 @theme syntax
4. index.astro has Header, Footer, FixedContact
5. All image references fixed to existing files
6. Hero uses hdpe_pipe_main.jpg
7. Product cards use hdpe001.jpg
8. pt-20 on main for fixed header

✅ TESTED LOCALLY:
- Build: 15 pages in 1.27s
- Docker build successful
- Port 80 working
- Images load
- CSS works

Ready for Easypanel deployment.

node_modules/cross-fetch/dist/node-polyfill.js

@@ -0,0 +1,11 @@
+const fetchNode = require('./node-ponyfill')
+
+if (!global.fetch) {
+  const fetch = fetchNode.fetch.bind({})
+
+  global.fetch = fetch
+  global.fetch.polyfill = true
+  global.Response = fetchNode.Response
+  global.Headers = fetchNode.Headers
+  global.Request = fetchNode.Request
+}